Welded wrought-iron annealing-pot.



E, T. LAMMINE. WELDED WROUGHT IRON ANNBALING POT.

APPLICATION FILED NOV. 4,1908.

Patented Jan. 9, 1912.

, Inventor witnesses MINE,

EMIL '.LHEOIDOIIR. LAMMINE, OF Mil/LHEIM-ON-THE-RHINE, GERMANY.

WELDED WROUGHT-IBON ANNELING-PG^T.

Specication of Letters Patent.

Patented J an. 9, 1912.

Application led November 4, 1908. Serial No. 461,054.

To all fwhom t may concern Be it known that I, EMIL THEoDoR LAM- a subject of the German Emperor,- and resident of Mlheim-on-the-Rhine, Ger-V many, have invented an Improvement in Welded Wrought-Iron Annealing-Pots, of which the following is a specification. v

The subject-matter of the present invention is a special improvement in Welded wrought iron annealing pots and comprises particularly a peculiar lmanner of fluting or corrugating the walls ofthe pot in relation to its ends. y

In the accompanying drawings, Figure 1 is a vertical sectional view through the center of an `annealing pot embodying the invention; Fig. 2 is a horizontal section on the line A-B of Fi 1; Fig. 3 is a fragmentary sectional view o the open end portion ofthe pot; Fig. 4 illustrates the form of cover preferably employed for-the pot; Figf is a view partly in section and partly 1n elevation of a modification of the, invention -wherein the ribs or corrugations are longitudinal or vertical; Fig. 6 is a plan view of the modification shown in Fig. 5.

A.By the employment of corrugations ,or ribs on the walls of the pot, the strength of the receptacle is necessarily materially in# creased and thinner metal may be used aside from the advantageous fact that a more effective annealing surface is obtained. Other advantages of the type of pot described, wherein, as shown in Fig. 1 of the-draw-v ings, the corrugations are 'provided annularly, are that it lasts longer and thatits wei ht is less. The corrugations or lutings of t e walls of the receptacle may be parallel or at a right angle tothe longitudinal axis thereof and the longitudinal arrangement of the corrugations is shown in Fig. 5.

The cover employed in connection with the pot shown in Fi 4 is reinforced by concentric rings, ren erin it much stiffer than a light cover and e iminating likelihood of warping and loss of proper shape. Furthermore, 'the concentric rings or {iut-'- lngs of the cover limit the expansion at the perlphery, and likelihood of the walls of the pot being thrown out of shape by such expansion is prevented.

vthe body is minimized materially It is found that, by usin -apot of the peculiar form shown in the rawings, there is less expansion of the body of the receptacle in use than incidental to the employment of .the smooth walled variety.

'The peculiar construction of the annealing pot wherein the corrugations ofthe body terminate a short distance fromeach;

end, is especially advantageous by reason of the corrugated portion intermediate the opposite extremities of the pot. In other words, the distortion of the end portions lof bv t e above structure, and the likelihood of the open end of the receptacle, which carriesk the lid, becoming distorted or mis-shapen, is reduced to the greatest possible extent. By the above described formation of the body of the annealing pot, the life of the receptacle is prolonged, for the corrugations on the body rigidify the same for obvious reasons, and the reduction of the buckling or distortion' tendencies affords clear advantages under practical conditions of service, and especially with reference to the lid supporting the end of the pot. Furthermore, the flange formed at the mouth or open end of the pot constltutes a virtual reinforcing corrugation, increasingthe substantiality of the open end of the receptacle, in addition to forming the seat for the lid.

Having thus described the invention, what is claimed as new is:

A11 annealing pot comprising a body Aformed 'with corrugations terminating a short distance from each end thereof, one end of the body being open and provlded with an integral at its open endA and forming a seat for the lid.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

EMIL THEoDoR LAMMINE.

Witnesses OswALD MEINECKE, .Louis VAivDonN.

4the fact that any tendency of the body to 'i buckle or become `distorted is confined to iiange reinforcing the body 

